/* ===================================================================
   MESL - 新潮漫画风格 (Pop Comic & Neo-Brutalism) 核心样式表
   极简无依赖 · 纯原生 CSS · 零阻塞毫秒级加载
   =================================================================== */

:root {
  --comic-black: #141414;
  --comic-white: #ffffff;
  --comic-bg: #fffbf0;
  --comic-paper: #fff9e6;
  --comic-yellow: #ffe600;
  --comic-cyan: #00f0ff;
  --comic-pink: #ff3377;
  --comic-green: #00e575;
  --comic-purple: #9d4edd;
  --comic-orange: #ff6b35;
  --comic-gray-light: #f4f2eb;
  --comic-gray: #71717a;
  
  --border-thick: 3px solid var(--comic-black);
  --border-thicker: 4px solid var(--comic-black);
  --shadow-sm: 3px 3px 0px var(--comic-black);
  --shadow-md: 5px 5px 0px var(--comic-black);
  --shadow-lg: 8px 8px 0px var(--comic-black);
  --shadow-hover: 7px 7px 0px var(--comic-black);
  --shadow-active: 1px 1px 0px var(--comic-black);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-comic: "Impact", "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-base);
  background-color: var(--comic-bg);
  background-image: radial-gradient(var(--comic-black) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: 0 0;
  color: var(--comic-black);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 容器与版心 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 漫画风标题与标签通用样式 */
.section-header {
  text-align: center;
  margin-bottom: 50px;
  position: relative;
}

.comic-badge {
  display: inline-block;
  background: var(--comic-yellow);
  color: var(--comic-black);
  font-weight: 800;
  font-size: 0.9rem;
  padding: 6px 16px;
  border: var(--border-thick);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 14px;
  transform: rotate(-1.5deg);
}

.section-title {
  font-family: var(--font-comic);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  color: var(--comic-black);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
  text-shadow: 2px 2px 0px var(--comic-white), 4px 4px 0px rgba(0,0,0,0.15);
}

.section-subtitle {
  font-size: 1.1rem;
  color: #3f3f46;
  max-width: 680px;
  margin: 0 auto;
  font-weight: 500;
}

/* 漫画风按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-base);
  font-weight: 800;
  font-size: 1.05rem;
  text-decoration: none;
  padding: 14px 28px;
  border: var(--border-thick);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
  min-height: 48px;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hover);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-active);
}

.btn-primary {
  background: var(--comic-yellow);
  color: var(--comic-black);
}

.btn-accent {
  background: var(--comic-pink);
  color: var(--comic-white);
}

.btn-cyan {
  background: var(--comic-cyan);
  color: var(--comic-black);
}

.btn-white {
  background: var(--comic-white);
  color: var(--comic-black);
}

.btn-block {
  width: 100%;
}

/* 顶部导航栏 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 251, 240, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: var(--border-thick);
  padding: 14px 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--comic-black);
}

.logo-badge {
  background: var(--comic-black);
  color: var(--comic-yellow);
  font-family: var(--font-comic);
  font-size: 1.7rem;
  font-weight: 900;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--comic-black);
  box-shadow: var(--shadow-sm);
  letter-spacing: 1px;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-weight: 900;
  font-size: 1.15rem;
  line-height: 1.1;
  color: var(--comic-black);
}

.logo-sub {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--comic-pink);
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--comic-black);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.nav-links a:hover {
  background: var(--comic-yellow);
  box-shadow: 2px 2px 0px var(--comic-black);
  transform: translate(-1px, -1px);
}

.nav-links a.nav-highlight {
  background: var(--comic-pink);
  color: var(--comic-white);
  border: 2px solid var(--comic-black);
  box-shadow: 2px 2px 0px var(--comic-black);
}

.nav-links a.nav-highlight:hover {
  background: var(--comic-yellow);
  color: var(--comic-black);
  box-shadow: 3px 3px 0px var(--comic-black);
  transform: translate(-1px, -1px);
}

/* 滚动跑马灯条 (Comic Marquee) */
.marquee-bar {
  background: var(--comic-black);
  color: var(--comic-yellow);
  border-top: var(--border-thick);
  border-bottom: var(--border-thick);
  padding: 10px 0;
  overflow: hidden;
  white-space: nowrap;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 1px;
}

.marquee-track {
  display: inline-flex;
  animation: marquee 28s linear infinite;
}

.marquee-item {
  display: inline-flex;
  align-items: center;
  margin-right: 40px;
}

.marquee-item span.icon {
  margin-right: 8px;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* 主视觉区 Hero */
.hero-section {
  padding: 60px 0 70px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  position: relative;
}

.hero-headline {
  font-family: var(--font-comic);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  color: var(--comic-black);
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.headline-highlight {
  display: inline-block;
  background: var(--comic-yellow);
  padding: 0 10px;
  border: var(--border-thick);
  box-shadow: 4px 4px 0px var(--comic-black);
  border-radius: var(--radius-sm);
  transform: rotate(-1deg);
  margin-top: 6px;
}

.hero-subtext {
  font-size: 1.15rem;
  color: #27272a;
  line-height: 1.65;
  margin-bottom: 30px;
  font-weight: 500;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-guarantee {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.88rem;
  font-weight: 700;
  color: #3f3f46;
}

.guarantee-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--comic-white);
  padding: 6px 12px;
  border: 2px solid var(--comic-black);
  border-radius: var(--radius-pill);
  box-shadow: 2px 2px 0px var(--comic-black);
}

/* Hero 右侧漫画风格卡片面板 */
.hero-visual-card {
  background: var(--comic-white);
  border: var(--border-thicker);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  position: relative;
}

.comic-sticker {
  position: absolute;
  top: -16px;
  right: -12px;
  background: var(--comic-pink);
  color: var(--comic-white);
  font-weight: 900;
  font-size: 0.85rem;
  padding: 8px 14px;
  border: var(--border-thick);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transform: rotate(6deg);
  z-index: 2;
  letter-spacing: 0.5px;
}

.visual-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--comic-black);
  padding-bottom: 12px;
  margin-bottom: 20px;
}

.visual-title {
  font-weight: 800;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.live-dot {
  width: 10px;
  height: 10px;
  background: var(--comic-green);
  border-radius: 50%;
  border: 2px solid var(--comic-black);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
  100% { transform: scale(1); opacity: 1; }
}

.speed-meter-box {
  background: var(--comic-paper);
  border: var(--border-thick);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.speed-number {
  font-family: var(--font-comic);
  font-size: 3rem;
  font-weight: 900;
  color: var(--comic-black);
  line-height: 1;
  margin: 6px 0;
}

.speed-unit {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--comic-pink);
}

.route-status-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.route-item {
  background: var(--comic-gray-light);
  border: 2px solid var(--comic-black);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 700;
}

.route-ping {
  color: #059669;
  font-weight: 900;
  background: #d1fae5;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--comic-black);
}

.unlock-status-bar {
  background: var(--comic-cyan);
  border: var(--border-thick);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-weight: 800;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* 核心优势板块 Features */
.features-section {
  padding: 80px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--comic-white);
  border: var(--border-thicker);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  box-shadow: var(--shadow-md);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  position: relative;
}

.feature-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-lg);
}

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border: var(--border-thick);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
}

.card-yellow .feature-icon-wrapper { background: var(--comic-yellow); }
.card-cyan .feature-icon-wrapper { background: var(--comic-cyan); }
.card-pink .feature-icon-wrapper { background: var(--comic-pink); color: #fff; }
.card-green .feature-icon-wrapper { background: var(--comic-green); }
.card-purple .feature-icon-wrapper { background: var(--comic-purple); color: #fff; }
.card-orange .feature-icon-wrapper { background: var(--comic-orange); color: #fff; }

.feature-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--comic-black);
}

.feature-desc {
  font-size: 0.95rem;
  color: #4b5563;
  line-height: 1.6;
  flex-grow: 1;
}

/* 流媒体与 AI 支持板块 */
.streaming-ai-section {
  padding: 80px 0;
  background: #fdf6db;
  border-top: var(--border-thick);
  border-bottom: var(--border-thick);
  position: relative;
}

.unlock-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.unlock-category-box {
  background: var(--comic-white);
  border: var(--border-thicker);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.category-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--comic-black);
  padding-bottom: 14px;
}

.category-header h3 {
  font-size: 1.35rem;
  font-weight: 900;
}

.badge-tag {
  background: var(--comic-black);
  color: var(--comic-yellow);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.service-chips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.service-chip {
  background: var(--comic-gray-light);
  border: 2px solid var(--comic-black);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 0.92rem;
}

.service-chip .status-pill {
  font-size: 0.72rem;
  font-weight: 800;
  background: #dcfce7;
  color: #15803d;
  padding: 2px 6px;
  border: 1px solid var(--comic-black);
  border-radius: 4px;
}

/* 对比横幅 (VS Banner) */
.comparison-banner {
  background: var(--comic-white);
  border: var(--border-thicker);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 24px 30px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: center;
}

.compare-col {
  padding: 12px;
}

.compare-col.bad {
  background: #fee2e2;
  border: 2px dashed #ef4444;
  border-radius: var(--radius-md);
}

.compare-col.good {
  background: #dcfce7;
  border: 2px solid #10b981;
  border-radius: var(--radius-md);
}

.compare-title {
  font-weight: 900;
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.compare-col.bad .compare-title { color: #b91c1c; }
.compare-col.good .compare-title { color: #047857; }

.compare-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: #374151;
}

.vs-badge {
  background: var(--comic-black);
  color: var(--comic-white);
  font-family: var(--font-comic);
  font-size: 1.4rem;
  font-weight: 900;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--comic-white);
  box-shadow: var(--shadow-sm);
  transform: rotate(-5deg);
}

/* 价格套餐板块 Pricing */
.pricing-section {
  padding: 80px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--comic-white);
  border: var(--border-thicker);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.2s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* 热门推荐套餐高亮 */
.pricing-card.featured {
  background: #fffef2;
  border-color: var(--comic-black);
  box-shadow: var(--shadow-lg);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-4px);
  box-shadow: 10px 10px 0px var(--comic-black);
}

.popular-ribbon {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%) rotate(-2deg);
  background: var(--comic-pink);
  color: var(--comic-white);
  font-weight: 900;
  font-size: 0.85rem;
  padding: 6px 18px;
  border: var(--border-thick);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  letter-spacing: 1px;
}

.plan-header {
  border-bottom: 2px solid var(--comic-black);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.plan-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  background: var(--comic-yellow);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--comic-black);
  margin-bottom: 10px;
}

.plan-name {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--comic-black);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--comic-gray);
  font-weight: 500;
}

.price-box {
  margin: 18px 0 10px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--comic-black);
}

.price-amount {
  font-family: var(--font-comic);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--comic-black);
}

.price-period {
  font-size: 0.95rem;
  font-weight: 700;
  color: #6b7280;
}

.feature-list {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.feature-list li {
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 0;
  border-bottom: 1px dashed #e4e4e7;
  display: flex;
  align-items: center;
  gap: 10px;
}

.feature-list li .check-icon {
  color: #10b981;
  font-weight: 900;
  font-size: 1.1rem;
}

/* 用户评价板块 Testimonials */
.testimonials-section {
  padding: 80px 0;
  background: #f2faff;
  border-top: var(--border-thick);
  border-bottom: var(--border-thick);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.speech-card {
  background: var(--comic-white);
  border: var(--border-thicker);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-md);
  position: relative;
  display: flex;
  flex-direction: column;
}

.user-stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.speech-text {
  font-size: 0.98rem;
  color: #27272a;
  line-height: 1.6;
  font-weight: 500;
  margin-bottom: 20px;
  flex-grow: 1;
  position: relative;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 2px solid var(--comic-black);
  padding-top: 14px;
}

.user-avatar-tag {
  width: 44px;
  height: 44px;
  background: var(--comic-yellow);
  border: 2px solid var(--comic-black);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  box-shadow: 2px 2px 0px var(--comic-black);
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-weight: 800;
  font-size: 0.95rem;
}

.user-tag {
  font-size: 0.78rem;
  color: var(--comic-gray);
  font-weight: 600;
}

/* 常见问题解答 FAQ */
.faq-section {
  padding: 80px 0;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-item {
  background: var(--comic-white);
  border: var(--border-thicker);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all 0.15s ease;
}

.faq-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translate(-1px, -1px);
}

.faq-item summary {
  padding: 20px 24px;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--comic-black);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  background: var(--comic-white);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-indicator {
  font-size: 1.3rem;
  font-weight: 900;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--comic-yellow);
  border: 2px solid var(--comic-black);
  border-radius: 50%;
  box-shadow: 2px 2px 0px var(--comic-black);
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-indicator {
  transform: rotate(45deg);
  background: var(--comic-pink);
  color: var(--comic-white);
}

.faq-content {
  padding: 0 24px 22px;
  font-size: 0.98rem;
  color: #374151;
  line-height: 1.7;
  border-top: 1px dashed #e4e4e7;
  padding-top: 16px;
  background: #fafaf9;
}

/* 底部行动召集 Banner (Bottom CTA) */
.bottom-cta-section {
  padding: 70px 0;
  background: var(--comic-yellow);
  border-top: var(--border-thicker);
  border-bottom: var(--border-thicker);
  text-align: center;
  position: relative;
}

.cta-box {
  max-width: 800px;
  margin: 0 auto;
}

.cta-box h2 {
  font-family: var(--font-comic);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--comic-black);
}

.cta-box p {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 28px;
  color: #1f2937;
}

/* 页脚 Footer - 严格根据用户指令设计：只保留4个标题，新窗口打开 */
.site-footer {
  background: var(--comic-black);
  color: var(--comic-white);
  padding: 40px 0;
}

.footer-nav-container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 36px;
  margin-bottom: 24px;
}

.footer-link {
  color: var(--comic-white);
  font-size: 1.1rem;
  font-weight: 800;
  text-decoration: none;
  padding: 8px 18px;
  border: 2px solid var(--comic-white);
  border-radius: var(--radius-sm);
  background: #1f1f1f;
  box-shadow: 3px 3px 0px var(--comic-yellow);
  transition: all 0.15s ease;
  letter-spacing: 0.5px;
}

.footer-link:hover {
  background: var(--comic-yellow);
  color: var(--comic-black);
  border-color: var(--comic-black);
  box-shadow: 3px 3px 0px var(--comic-pink);
  transform: translate(-2px, -2px);
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: #a1a1aa;
  font-weight: 600;
}

/* ===================================================================
   独立子页面样式 (关于我们 / 服务条款 / 隐私政策 / 网站地图)
   =================================================================== */
.subpage-header {
  padding: 50px 0 30px;
  text-align: center;
  border-bottom: var(--border-thick);
  background: var(--comic-paper);
}

.subpage-container {
  max-width: 900px;
  margin: 50px auto 80px;
  padding: 0 20px;
}

.subpage-card {
  background: var(--comic-white);
  border: var(--border-thicker);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--shadow-lg);
  margin-bottom: 40px;
}

.subpage-card h2 {
  font-size: 1.6rem;
  font-weight: 900;
  margin: 30px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--comic-black);
  color: var(--comic-black);
  display: flex;
  align-items: center;
  gap: 10px;
}

.subpage-card h2:first-of-type {
  margin-top: 0;
}

.subpage-card p {
  font-size: 1.02rem;
  color: #27272a;
  line-height: 1.8;
  margin-bottom: 16px;
}

.subpage-card ul, .subpage-card ol {
  margin: 16px 0 24px 24px;
}

.subpage-card li {
  font-size: 1rem;
  color: #374151;
  line-height: 1.7;
  margin-bottom: 10px;
}

.highlight-box {
  background: #fef08a;
  border: 2px solid var(--comic-black);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  margin: 24px 0;
  font-weight: 600;
}

.highlight-box.alert {
  background: #fee2e2;
  border-color: #dc2626;
}

.highlight-box.success {
  background: #dcfce7;
  border-color: #16a34a;
}

/* 网站地图网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.sitemap-box {
  background: var(--comic-gray-light);
  border: 2px solid var(--comic-black);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.sitemap-box h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--comic-black);
  border-bottom: 2px solid var(--comic-black);
  padding-bottom: 6px;
}

.sitemap-box ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sitemap-box li {
  margin-bottom: 8px;
}

.sitemap-box a {
  color: var(--comic-black);
  text-decoration: none;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.sitemap-box a:hover {
  background: var(--comic-yellow);
  box-shadow: 2px 2px 0px var(--comic-black);
  transform: translateX(4px);
}

/* 返回首页按钮栏 */
.subpage-backbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 30px;
}

/* ===================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏自适应
   =================================================================== */

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .comparison-banner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .vs-badge {
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 10px 0 8px;
  }
  
  .nav-container {
    flex-wrap: wrap;
    gap: 10px;
  }
  
  .nav-links {
    order: 3;
    width: 100%;
    display: flex;
    overflow-x: auto;
    white-space: nowrap;
    gap: 8px;
    padding: 4px 2px;
    -webkit-overflow-scrolling: touch;
  }
  
  .nav-links::-webkit-scrollbar {
    display: none;
  }
  
  .nav-links li {
    flex-shrink: 0;
  }
  
  .nav-links a {
    font-size: 0.85rem;
    padding: 5px 10px;
    border: 2px solid var(--comic-black);
    background: var(--comic-white);
    box-shadow: 2px 2px 0px var(--comic-black);
  }
  
  .hero-section {
    padding: 40px 0 50px;
  }
  
  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
  }
  
  .hero-cta-group .btn {
    width: 100%;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .unlock-grid {
    grid-template-columns: 1fr;
  }
  
  .service-chips-grid {
    grid-template-columns: 1fr;
  }
  
  .subpage-card {
    padding: 24px 18px;
  }
  
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-nav-container {
    flex-direction: column;
    gap: 16px;
    align-items: stretch;
  }
  
  .footer-link {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .section-title {
    font-size: 1.85rem;
  }
  
  .hero-headline {
    font-size: 2.1rem;
  }
  
  .price-amount {
    font-size: 2.6rem;
  }
  
  .btn {
    padding: 12px 20px;
    font-size: 0.98rem;
  }
  
  .faq-item summary {
    padding: 16px 18px;
    font-size: 1rem;
  }
}

/* ===================================================================
   高科技网格卡片 (High-Tech Grid Cards) - 推荐咨询文章列表
   =================================================================== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin: 36px 0;
}

.article-card {
  background: var(--comic-white);
  border: var(--border-thicker);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--comic-yellow), var(--comic-pink), var(--comic-cyan));
}

.article-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-lg);
}

.article-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 10px;
  border: 1.5px solid var(--comic-black);
  border-radius: var(--radius-sm);
  background: var(--comic-yellow);
  box-shadow: 2px 2px 0px var(--comic-black);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--comic-black);
  margin-bottom: 10px;
}

.article-title a {
  color: inherit;
  text-decoration: none;
}

.article-title a:hover {
  color: var(--comic-pink);
  text-decoration: underline;
}

.article-excerpt {
  font-size: 0.88rem;
  color: #4b5563;
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px dashed #e4e4e7;
  padding-top: 14px;
  font-size: 0.82rem;
  color: #71717a;
  font-weight: 600;
}

.article-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--comic-black);
  text-decoration: none;
  background: var(--comic-cyan);
  padding: 6px 14px;
  border: 2px solid var(--comic-black);
  border-radius: var(--radius-sm);
  box-shadow: 2px 2px 0px var(--comic-black);
  transition: all 0.15s ease;
}

.article-btn:hover {
  background: var(--comic-yellow);
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0px var(--comic-black);
}

@media (max-width: 992px) {
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
}